<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<% 
             request.setCharacterEncoding("UTF-8");
             String name=request.getParameter("a");
             String pwd=request.getParameter("v");
%>
用户名:<%=name %>
密码:<%=pwd %>

信息来源:<%
    
   String [] changes = request.getParameterValues("change"); 
		for (String change:changes){
			out.print(change);
		}
	%>
</body>
</html>